/**
 */
package Alloy;

import org.eclipse.emf.ecore.EObject;

/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Obtains Expression</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * Obtains-Expressions
 * Some thing that obtains in a world under certain conditions
 * the obtains attribute is used to specify negation
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link Alloy.ObtainsExpression#isObtains <em>Obtains</em>}</li>
 * </ul>
 * </p>
 *
 * @see Alloy.AlloyPackage#getObtainsExpression()
 * @model abstract="true"
 * @generated
 */
public interface ObtainsExpression extends EObject {
	/**
	 * Returns the value of the '<em><b>Obtains</b></em>' attribute.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Obtains</em>' attribute isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Obtains</em>' attribute.
	 * @see #setObtains(boolean)
	 * @see Alloy.AlloyPackage#getObtainsExpression_Obtains()
	 * @model required="true"
	 * @generated
	 */
	boolean isObtains();

	/**
	 * Sets the value of the '{@link Alloy.ObtainsExpression#isObtains <em>Obtains</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Obtains</em>' attribute.
	 * @see #isObtains()
	 * @generated
	 */
	void setObtains(boolean value);

} // ObtainsExpression
